d SJ4-3 sg144_1. Marginal effects of the tobit model d Marginal effects of the tobit model d updated by May Boggess, StataCorp d originally written by Ronna Cong, previously of StataCorp d Support: mmb@@stata.com d After installation, type help ^dtobit^ f sg144_1/dtobit.ado f sg144_1/dtobit.hlp